This or a similar question may be asked in case your Chromecast stops working. There may indeed be different causes why your Chromecast is not working, especially if
(Note: if the error is not found, please log a ticket into our service desk)
However, in this article we are not covering all possible causes for a broken Chromecast: we are here referring specifically to a previously working implementation that has not been changed, and on which the Chromecast icon is no longer appearing.
So, if there have been no changes on your page but the Chromecast icon in your webplayer does not appear any longer, you might want to check that:
The latest version of chrome (72.0.3626.81), does indeed no longer allow to cast over http, but this will work properly over https.